A great variety of devices has been developed based upon this material having unique electro-optical, photoelastic, piezo-electric and non-linear properties combined with good mechanical and chemical stability and wide transparency range. For instance, in optical modulation and Q-switching large electro-optic coefficients of lithium niobate infrared wavelengths is used. By-turn, the large nonlinear (d) coefficient of LiNbO3 allows very successfully use this material in optical parametric oscillaton and difference frequency mixing to generate tunable infrared wavelengths and second harmonic.